On the templating of curvature in zeolites

The cage and tunnel descriptions of some zeolite crystal structures have previously been shown to be succinctly described as structural networks lying on periodic minimal surfaces, which are saddle-shaped surfaces whose average curvature vanishes everywhere on the surface. The authors establish here...

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Bibliographic Details
Published in:Chemistry of materials 1990-05, Vol.2 (3), p.312-314
Main Authors: Blum, Zoltan, Hyde, Stephen
Format: Article
Language:English
Subjects:
400201 > Chemical & Physicochemical Properties
CALCULATION METHODS
CATALYSTS
DATA
INFORMATION
INORGANIC ION EXCHANGERS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
ION EXCHANGE MATERIALS
MATERIALS
MATERIALS SCIENCE
MATHEMATICAL MODELS
MINERALS
MOLECULAR MODELS
MORPHOLOGY
NUMERICAL DATA 360202 > Ceramics, Cermets, & Refractories-- Structure & Phase Studies
THEORETICAL DATA
ZEOLITES
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Summary:The cage and tunnel descriptions of some zeolite crystal structures have previously been shown to be succinctly described as structural networks lying on periodic minimal surfaces, which are saddle-shaped surfaces whose average curvature vanishes everywhere on the surface. The authors establish here that the vanishing average curvature of these structures is due to the templating effect of typical cations (e.g., tetraalkyl-ammonium ions) used to synthesize the zeolites. These cations form large hydrated spheres in solution. This model is applied to the synthesis of the zeolites sodalite, synthetic gismondine, and silicalite I.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm00009a023